EP0178655A3 - Acoustic wave filter - Google Patents
Acoustic wave filter Download PDFInfo
- Publication number
- EP0178655A3 EP0178655A3 EP85113143A EP85113143A EP0178655A3 EP 0178655 A3 EP0178655 A3 EP 0178655A3 EP 85113143 A EP85113143 A EP 85113143A EP 85113143 A EP85113143 A EP 85113143A EP 0178655 A3 EP0178655 A3 EP 0178655A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- digital
- acoustic wave
- wave filter
- structures
- center frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6423—Means for obtaining a particular transfer characteristic
- H03H9/6426—Combinations of the characteristics of different transducers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Thermistors And Varistors (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filters And Equalizers (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85113143T ATE55520T1 (en) | 1984-10-18 | 1985-10-16 | ACOUSTIC WAVE FILTER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843438246 DE3438246A1 (en) | 1984-10-18 | 1984-10-18 | ACOUSTIC WAVE FILTER |
DE3438246 | 1984-10-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0178655A2 EP0178655A2 (en) | 1986-04-23 |
EP0178655A3 true EP0178655A3 (en) | 1987-04-29 |
EP0178655B1 EP0178655B1 (en) | 1990-08-08 |
Family
ID=6248242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85113143A Expired - Lifetime EP0178655B1 (en) | 1984-10-18 | 1985-10-16 | Acoustic wave filter |
Country Status (6)
Country | Link |
---|---|
US (1) | US4703290A (en) |
EP (1) | EP0178655B1 (en) |
JP (1) | JPS6199409A (en) |
AT (1) | ATE55520T1 (en) |
CA (1) | CA1240006A (en) |
DE (2) | DE3438246A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3001349B2 (en) * | 1993-05-19 | 2000-01-24 | 日本電気株式会社 | Surface acoustic wave filter |
JP3154402B2 (en) * | 1997-11-12 | 2001-04-09 | 日本電気株式会社 | SAW filter |
JP2001136048A (en) * | 1999-11-09 | 2001-05-18 | Nec Corp | Surface acoustic wave filter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3550045A (en) * | 1969-06-25 | 1970-12-22 | Zenith Radio Corp | Acoustic surface wave filter devices |
EP0016979A1 (en) * | 1979-03-12 | 1980-10-15 | Siemens Aktiengesellschaft | Acoustic wave filter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3882433A (en) * | 1974-02-15 | 1975-05-06 | Zenith Radio Corp | Swif with transducers having varied duty factor fingers for trap enhancement |
US3987376A (en) * | 1974-03-22 | 1976-10-19 | Hazeltine Corporation | Acoustic surface wave device with harmonic coupled transducers |
DE2615719A1 (en) * | 1976-04-09 | 1977-10-27 | Siemens Ag | Filter based on surface wave principle - has weighted and non-weighted transducers giving mean frequency with linear phase characteristic |
US4075582A (en) * | 1976-06-14 | 1978-02-21 | International Business Machines Corporation | Surface acoustic wave device |
US4315228A (en) * | 1980-07-03 | 1982-02-09 | Westinghouse Electric Corp. | Multiple co-surface acoustic wave filters |
-
1984
- 1984-10-18 DE DE19843438246 patent/DE3438246A1/en not_active Withdrawn
-
1985
- 1985-10-14 JP JP60228557A patent/JPS6199409A/en active Pending
- 1985-10-15 US US06/787,111 patent/US4703290A/en not_active Expired - Fee Related
- 1985-10-16 DE DE8585113143T patent/DE3579097D1/en not_active Expired - Fee Related
- 1985-10-16 CA CA000493026A patent/CA1240006A/en not_active Expired
- 1985-10-16 EP EP85113143A patent/EP0178655B1/en not_active Expired - Lifetime
- 1985-10-16 AT AT85113143T patent/ATE55520T1/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3550045A (en) * | 1969-06-25 | 1970-12-22 | Zenith Radio Corp | Acoustic surface wave filter devices |
EP0016979A1 (en) * | 1979-03-12 | 1980-10-15 | Siemens Aktiengesellschaft | Acoustic wave filter |
Non-Patent Citations (1)
Title |
---|
1976 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST OF TECHNICAL PAPERS, Cherry Hill, 14.-16. Juni 1976, Seiten 283-285, IEEE, New York, US; G.L.MATTHAEI: "Acoustic-surface-wave resonators for band-pass filter applications * |
Also Published As
Publication number | Publication date |
---|---|
EP0178655B1 (en) | 1990-08-08 |
US4703290A (en) | 1987-10-27 |
DE3438246A1 (en) | 1986-04-24 |
EP0178655A2 (en) | 1986-04-23 |
ATE55520T1 (en) | 1990-08-15 |
JPS6199409A (en) | 1986-05-17 |
CA1240006A (en) | 1988-08-02 |
DE3579097D1 (en) | 1990-09-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2183281A1 (en) | Surface Acoustic Wave Filter | |
CA2110362A1 (en) | Surface Acoustic Wave Filter and Mobile Communication System Using Same | |
DE2960263D1 (en) | Piezoelectric transducers with mechanical amplification for very low frequencies and acoustic antennas | |
GB1529942A (en) | Electrical filters including coupled resonators | |
CA2234513A1 (en) | Surface acoustic wave device | |
EP0092956A3 (en) | Narrow-frequency band acoustic transducer | |
JPS5698651A (en) | Sound converter | |
KR890004492A (en) | Surface acoustic wave filter for removing ground interference of satellite receiver | |
EP0178655A3 (en) | Acoustic wave filter | |
JPS568914A (en) | Low-frequency dispersed type delay line | |
YU67080A (en) | Acoustic wave filter | |
EP0257377A3 (en) | Surface wave resonator structure comprising reflective finger metallization strips divided into parts | |
GB1381912A (en) | Acoustic wave devices | |
EP0307196A3 (en) | Edge coupled magnetostatic wave structures | |
JPS5773514A (en) | Surface acoustic wave filter | |
EP0064382A3 (en) | Surface acoustic wave filter | |
JPS5289441A (en) | Frequency band dividing filter | |
EP0104740A3 (en) | Broad band surface acoustic wave edge deposited transducer | |
JPS55107319A (en) | Surface acoustic wave filter | |
JPS5693490A (en) | Sound intermediate frequency signal detecting circuit | |
JPS5762616A (en) | Filter circuit using surface acoustic wave filter | |
JPS55153417A (en) | Surface acoustic wave device | |
GB1433398A (en) | Acoustic surface-wave devices | |
JPS57129013A (en) | Surface acoustic wave filter | |
JPS55114020A (en) | Elastic surface wave filter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19870422 |
|
17Q | First examination report despatched |
Effective date: 19890125 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19900808 Ref country code: NL Effective date: 19900808 Ref country code: GB Effective date: 19900808 |
|
REF | Corresponds to: |
Ref document number: 55520 Country of ref document: AT Date of ref document: 19900815 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3579097 Country of ref document: DE Date of ref document: 19900913 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19951218 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19960118 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19961008 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19961017 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19961025 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19961031 Ref country code: CH Effective date: 19961031 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19970701 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19971016 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19971031 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19971031 |
|
BERE | Be: lapsed |
Owner name: SIEMENS A.G. Effective date: 19971031 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |